Test Analysis on Bearing Capacity of PHS Static Pressure Pile in Gravel Concrete Guiding-Hole
Abstract
In order to solve the problem that gravel soil static pressure prestressed high-strength concrete square (PHS) pile are challenging to construct, it is difficult to reach the design effective pile length and cause the foundation bearing capacity to be insufficient, this study adopts the fine gravel concrete guiding hole process based on gravel soil static pressure PHS piles and analyzes and researches its bearing capacity. In this paper, a set of test piles was designed for gravel soil with specific engineering cases. Use a long spiral pilot hole to pour concrete strength class 25 (C25) plain concrete followed by static compression of a 12m square pile to form a pile. Then, use theoretical calculations, numerical simulations, and static load tests to determine its load-carrying capacity. By studying the bearing capacity of the test piles, it was found that the bearing capacity of the concrete guiding-hole PHS static pressure piles was increased by about 60% after guiding the holes, which significantly improved the foundation bearing capacity and stability, and also significantly improved the economy of the project. Gravel soil static pressure PHS piles has a greater bearing capacity, higher stability, and higher strength, and also meets the requirements of industry standards and specifications, so it is highly feasible.
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